【单选题】A. aboard, B. mission, C.attach He regards learning as a daily experience as well as a lifetime _____.
【单选题】十六大报告的灵魂与贯穿全篇的一条主线是_____ (易)(第六章)
【判断题】路基边坡坡度是指路基边坡的倾斜程度,一般用边坡的高度与水平距离的比值来表示。()
【判断题】产量指标通常采用实物单位或假定实物单位来计量
【简答题】萃取液中 A 和 B 的比值和萃取相中 。
【单选题】If the elasticity of supply coefficient for a good is one-sixth (in absolute terms), we know:
A.
that for every 1% increase in quantity, there will be a 6% increase in price.
B.
that for every 1% increase in quantity, there will be a 6% decrease in price.
C.
that for every 6% increase in quantity, there will be a 1% increase in price.
D.
that for every 6% increase in quantity, there will be a 1% decrease in price.
【单选题】拟用萃取方法提取丙酮水溶液中的丙酮。原料液的处理量为120kg,其中丙酮的质量分率为0.3。萃取剂为纯氯苯,总量为100kg。在操作条件下,水和氯苯可视作完全不互溶,且以质量比表示相组成的分配系数平均值为K=1.25。单级萃取时丙酮的萃取率是()。
【判断题】产值指标通常采用实物单位或假定实物单位来计量
【单选题】He regards learning as a daily experience as well as a lifetime__________ .